Artwork: T. rex was a formidable predator during the Cretaceous Period As a big, active predator, the mighty Tyrannosaurus rex needed a way to cool down. Now, scientists say that two large holes ...

Yet Giganotosaurus carolinii is always getting compared to the world's most popular dinosaur, the beloved and well-known ...

Details about the juvenile Tyrannosaurus rex fossil discovered by three boys in North Dakota are beginning to take shape, including its size, age and how its body worked.